[INFO] updating cached repository https://github.com/jackwillis/font-metrics
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c24318bffa11feeb118b379eca016471bb5633a5
[INFO] testing jackwillis/font-metrics against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjackwillis%2Ffont-metrics" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jackwillis/font-metrics on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jackwillis/font-metrics
[INFO] finished tweaking git repo https://github.com/jackwillis/font-metrics
[INFO] tweaked toml for git repo https://github.com/jackwillis/font-metrics written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jackwillis/font-metrics already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stdout] 5482f174926aa22ad4b7fd991e5560e007efcf98de3016b943d8a541c4f4ae89
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "5482f174926aa22ad4b7fd991e5560e007efcf98de3016b943d8a541c4f4ae89"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling num-traits v0.2.4
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling pom v1.1.0
[INFO] [stderr]    Compiling postscript v0.11.1
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling stb_truetype v0.2.2
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling adobe-cmap-parser v0.3.2
[INFO] [stderr]    Compiling type1-encoding-parser v0.1.0
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling approx v0.2.0
[INFO] [stderr]    Compiling ordered-float v0.5.0
[INFO] [stderr]    Compiling euclid v0.15.6
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling rusttype v0.6.1
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling chrono v0.3.0
[INFO] [stderr]    Compiling lopdf v0.15.1
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling pdf-extract v0.4.3
[INFO] [stderr]    Compiling font_metrics v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr] error: expected one of `,`, `.`, `?`, `}`, or an operator, found reserved identifier `_`
[INFO] [stderr]    --> bin/fm-fit.rs:181:13
[INFO] [stderr]     |
[INFO] [stderr] 180 |             "russian" => include_str!("../resources/russian.example.tex")
[INFO] [stderr]     |                       -- while parsing the `match` arm starting here     - expected one of `,`, `.`, `?`, `}`, or an operator
[INFO] [stderr] 181 |             _ => "uh oh",
[INFO] [stderr]     |             ^ unexpected token
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `English`
[INFO] [stderr]   --> bin/fm-darkness.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     English,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Russian`
[INFO] [stderr]   --> bin/fm-darkness.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Russian,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Custom`
[INFO] [stderr]   --> bin/fm-darkness.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     Custom(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `font_metrics`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "5482f174926aa22ad4b7fd991e5560e007efcf98de3016b943d8a541c4f4ae89"`
[INFO] running `"docker" "rm" "-f" "5482f174926aa22ad4b7fd991e5560e007efcf98de3016b943d8a541c4f4ae89"`
[INFO] [stdout] 5482f174926aa22ad4b7fd991e5560e007efcf98de3016b943d8a541c4f4ae89